Source Code : Sample Sliders

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Sample Sliders

  
/*
Definitive Guide to Swing for Java 2, Second Edition
By John Zukowski     
ISBN: 1-893115-78-X
Publisher: APress
*/

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.Container;
import java.awt.Graphics;
import java.awt.Polygon;
import java.util.Hashtable;

import javax.swing.Icon;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JSlider;

public class SampleSliders {
  public static void main(String args[]) {
    String title = (args.length == 0 ? "Sample Slider" : args[0]);
    JFrame f = new JFrame(title);
    f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    JSlider js1 = new JSlider();
    js1.putClientProperty("JSlider.isFilled", Boolean.TRUE);
    JSlider js2 = new JSlider();
    js2.setMajorTickSpacing(25);
    js2.setPaintTicks(true);
    js2.setSnapToTicks(true);
    JSlider js3 = new JSlider(JSlider.VERTICAL);
    js3.setPaintTrack(false);
    js3.setMinorTickSpacing(5);
    js3.setMajorTickSpacing(10);
    js3.setPaintTicks(true);
    js3.setPaintLabels(true);
    js3.setSnapToTicks(true);
    JSlider js4 = new JSlider(JSlider.VERTICAL);
    Hashtable table = new Hashtable();
    table.put(new Integer(0), new JLabel(new DiamondIcon(Color.red)));
    table.put(new Integer(10), new JLabel("Ten"));
    table.put(new Integer(25), new JLabel("Twenty-Five"));
    table.put(new Integer(34), new JLabel("Thirty-Four"));
    table.put(new Integer(52), new JLabel("Fifty-Two"));
    table.put(new Integer(70), new JLabel("Seventy"));
    table.put(new Integer(82), new JLabel("Eighty-Two"));
    table.put(new Integer(100), new JLabel(new DiamondIcon(Color.black)));
    js4.setLabelTable(table);
    js4.setPaintLabels(true);
    js4.setSnapToTicks(true);
    Container c = f.getContentPane();
    c.add(js1, BorderLayout.NORTH);
    c.add(js2, BorderLayout.SOUTH);
    c.add(js3, BorderLayout.WEST);
    c.add(js4, BorderLayout.EAST);
    f.setSize(300, 200);
    f.setVisible(true);
  }
}

class DiamondIcon implements Icon {
  private Color color;

  private boolean selected;

  private int width;

  private int height;

  private Polygon poly;

  private static final int DEFAULT_WIDTH = 10;

  private static final int DEFAULT_HEIGHT = 10;

  public DiamondIcon(Color color) {
    this(color, true, DEFAULT_WIDTH, DEFAULT_HEIGHT);
  }

  public DiamondIcon(Color color, boolean selected) {
    this(color, selected, DEFAULT_WIDTH, DEFAULT_HEIGHT);
  }

  public DiamondIcon(Color color, boolean selected, int width, int height) {
    this.color = color;
    this.selected = selected;
    this.width = width;
    this.height = height;
    initPolygon();
  }

  private void initPolygon() {
    poly = new Polygon();
    int halfWidth = width / 2;
    int halfHeight = height / 2;
    poly.addPoint(0, halfHeight);
    poly.addPoint(halfWidth, 0);
    poly.addPoint(width, halfHeight);
    poly.addPoint(halfWidth, height);
  }

  public int getIconHeight() {
    return height;
  }

  public int getIconWidth() {
    return width;
  }

  public void paintIcon(Component c, Graphics g, int x, int y) {
    g.setColor(color);
    g.translate(x, y);
    if (selected) {
      g.fillPolygon(poly);
    } else {
      g.drawPolygon(poly);
    }
    g.translate(-x, -y);
  }
}

           
         
    
  

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